-noun 1. One who sacks balls. -adj. 1. A male exhibiting the character traits of one apt to pummel one's own privates as penance for negligence. Similar to a moron.

-noun. Jerry got stuck sacking balls after PhysEd, he's Mr. Kanton's ballsacker till the end of the quarter. -adj.Eli, man that guy, all this time I never took him for a ballsacker, but there you go....whatta ballsacker!